Double Bay House

December 5, 2023

Architect: Stanic Harding Architects
Builder: Toki Constructions
Louvre + Privacy Screen System: Tilt Industrial Design
Interiors: Interni
Geotechnical Consultant: JK Geotechnics

The house at Double Bay was another wonderful project with our long-term collaborators, Stanic Harding Architects. The four-storey house featured off-form concrete with highly detailed concrete slabs and profiles (including some pre-cast units), complex steel and timber framing, and a highly bespoke operable louvre system which was designed and detailed in collaboration with Tilt Industrial Design. Other elements included a swimming pool, bespoke balustrades and fencing, shotcrete upstands and more. The principal contractor for the project was Toki Construction.

One of the key challenges for the project was that the basement level was founded in loose sand and below the water table. The complex excavation involved secant piling, de-watering, membrane and waterproofing works, and – in the temporary phase – ballast design to prevent the basement from “popping” out of the ground due to uplift water pressures! Temporary propping and other works were also designed to allow mobile cranes to move across the Ground Floor slab, as the crane loads exceeded the slab’s inherent capacity. Special detailing in the concrete allowed mild steel, stainless steel, and aluminium to all serve their role in the architectural features. Structural support systems were a combination of steel columns, concrete blades, and loadbearing masonry.

The project spent four years running through the Partridge office, with preliminary design advice for the DA submission kicking off in September 2019; detailed design commencing in July 2020; and then work on site commencing in February 2021. It culminated with the final pool fence and gate details being designed and signed-off in October this year, just a few days before the keys were handed over to the client!

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